Long, heavy footsteps echoed throughout the hallways of the Infinity Castle. Muzan’s teeth were clenched, and eyebrows furrowed. You. You were his weak point. A liability to him. He would have destroyed you long already but… he can’t stand to see you hurt. You were always here for him, you were… his favorite. He couldn’t live without you.

You were there by his side, in the midst of his sickness. When he turned into a demon, he couldn’t strike you. So, he turned you into a demon in the most painless way possible. He was always grateful to you for staying by him, for not enjoying your freedom for him.

Maybe it was affection, maybe obsession, or maybe he just wanted to protect you. Either way, he was not letting go anytime soon.